21213322111123 has 8 divisors (see below), whose sum is σ = 21408898048560. Its totient is φ = 21017763597600.

The previous prime is 21213322111099. The next prime is 21213322111139. The reversal of 21213322111123 is 32111122331212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21213322111123 is a prime.

It is a super-2 number, since 2×21213322111123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21213322114123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1903453 + ... + 6785998.

It is an arithmetic number, because the mean of its divisors is an integer number (2676112256070).

Almost surely, 2^{21213322111123} is an apocalyptic number.

21213322111123 is a deficient number, since it is larger than the sum of its proper divisors (195575937437).

21213322111123 is a wasteful number, since it uses less digits than its factorization.

21213322111123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8711957.

The product of its digits is 864, while the sum is 25.

Adding to 21213322111123 its reverse (32111122331212), we get a palindrome (53324444442335).

The spelling of 21213322111123 in words is "twenty-one trillion, two hundred thirteen billion, three hundred twenty-two million, one hundred eleven thousand, one hundred twenty-three".